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Patient-assessed health instruments for the knee: a structured review
A M Garratt1, S Brealey, W J Gillespie
1Department of Public Health, University of Oxford, UK.
Rheumatology (Oxford, England)
|August 19, 2004
Summary
Selecting the best knee health instrument is challenging due to numerous options. The Knee Injury and Osteoarthritis Outcome Score (KOOS) and Oxford Knee Score show strong evidence for reliability and validity.
Area of Science:
- Orthopedics
- Rheumatology
- Health Outcomes Research
Background:
- Patient-assessed health instruments are crucial for evaluating knee conditions.
- A wide array of instruments exist, necessitating a review of their psychometric properties.
Purpose of the Study:
- To identify patient-assessed instruments specifically for knee conditions.
- To review the evidence for the reliability, validity, and responsiveness of these instruments.
Main Methods:
- Systematic literature searches were conducted to identify relevant instruments.
- Data on instrument content, patient populations, and psychometric properties were extracted.
Main Results:
- Sixteen instruments met the inclusion criteria, varying in length and scoring methods.
- While most instruments demonstrated good reliability, evidence for content validity was limited for some.
- Eleven instruments showed responsiveness to health changes, but minimally important difference was not established for any.
Conclusions:
- Instrument selection for knee problems is difficult due to the lack of comparative data.
- The Knee Injury and Osteoarthritis Outcome Score (KOOS), Knee Pain Scale, and Oxford Knee Score have strong evidence for reliability and validity.
- Further comparative evaluation of knee outcome instruments is recommended to guide clinical application.